Skip to Content
Apps by JS

Custom Software · iOS Apps · Revit Add-ins Build Smarter Software. Faster.

Mobile apps and custom systems engineered for real-world workflows.

What We’ve Built

Two smartphones displaying apps: the left phone shows a plant watering schedule with a photo of a green potted plant, and the right phone shows a travel app with trip logs, including one for camping and beach trips, with photos of a tent and a beach scene.

Days Since (opens in a new tab)

A top-rated countdown app downloaded over a million times, with a 4.8★ rating from thousands of reviews, built to make tracking time simple, fast, and actually useful. Whether it’s days until something big or days since something important, users consistently call it “exactly what I needed” for staying organized and in control of their time.

Learn more… (opens in a new tab)

An iPad displaying a landscaping project plan with plant placement, walkway, and new path lights, placed on a wooden surface with a white stylus above it.

FieldGraph

A simple, field-ready drawing tool that turns quick sketches into clean, shareable plans. Map layouts on a graph grid, add notes, photos, and measurements, and export polished PDFs in minutes—no CAD overhead, no cleanup later.

A 3D architectural model of a house created in a design software, with a pop-up window for energy performance analysis, displaying options for air to air, gas, geothermal, and oil energy sources.

Energy Analysis

Custom energy analysis software built to evaluate building performance and energy requirements using 3D BIM models. By leveraging the information already in the model, the process reduces manual effort, improves accuracy, and delivers consistent, scalable results.

Screenshot of a software interface with multiple toolbars containing various icons and labels for architecture, structure, systems, insert, annotate, analyze, and other tools related to building design and analysis.

Custom Revit Addins

We build Revit add-ins that last. Dozens deployed across teams, with long-term reliability proven over 15+ years in production.

A computer screen displaying a software interface for editing shared parameters, and four smartphones showing different apps: a voting map of congressional districts, a family photo app, a growth tracking app, and an update notification for an app.

Beyond the Highlights

Some fun, some professional, all built to solve real problems.

Start a project

Let’s Solve It

Outline your problem and I’ll help define a practical, buildable solution that’s delivered efficiently and without unnecessary overhead.

  1. Share the problem

    Tell me what’s slowing you down, in plain language.

  2. Get a practical plan

    A clear, buildable scope — no unnecessary overhead.

  3. Ship it

    Delivered efficiently, built to last in production.

Prefer email? appsbyjs@outlook.com

Contact

Name